'What does npm ERR! code ELSPROBLEMS mean?

Building a node project, using serverless

Firstly I get the error

Error:
Error: npm ls -prod -json -depth=1 failed with code 1
  at ChildProcess.<anonymous> (/Users/jrobens/NetBeansProjects/azuron/winpay/winpay- 

uploader/node_modules/serverless-webpack/lib/utils.js:91:16)

To find our more information I enter npm ls -prod -json -depth=1 and get

npm ERR! code ELSPROBLEMS
npm ERR! invalid: [email protected] 
/my-project/node_modules/serverless
{

It looks as though webpack worked

webpack compiled successfully in 4581 ms

About the environment: node-14, typescript, aws

├── @serverless/[email protected]
├── @types/[email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]
├── [email protected]


Sources

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Source: Stack Overflow

Solution Source